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Phull PS, Ryder SD, Halliday D, Price AB, Levi AJ, Jacyna MR.Phull PS, et al. Among authors: jacyna mr.Postgrad Med J. 1995 Jul;71(837):413-8. doi: 10.1136/pgmj.71.837.413.Postgrad Med J. 1995.PMID: 7567733Free PMC article.